HOW WAS PHYSICS PAPER 2 AS!!!!!!!!!!!

[AppleGreen]

That uncertainty question took so long -.- I left it so I could come back to it at the end and still didnt get time to do it ! I lost marks for no reason -.- I am loosing ten marks for sureee ! But the paper was more of theory than calculations I am glad it was like that ! Btw for the output power was it the gain in potential per unit time or not ?

nope. there is work done against frictional force

 

[BILALrox01]

so explain me aswell

well y axis had intensity. wen intensity is 0 the ball is at a node dat is zero amplitude. so distance between two nodes was .68m

 

[BILALrox01]

and what a

and what about question no 4 last part was resistance decreasing

wat about it?

 

[WhereAmazingHappens]

lol how come u can be so confident with a definitely wrong ans?

Why indeed.... oh thats right...cuz my answer is correct

 

[BILALrox01]

ye
ah agree with you the above guy is wrong

100% sure i am ryt. distance between two node gives wavelength. nodes occurs wen amplitude is zro and so intensity is also zero. the distance was 0.68

 

[BILALrox01]

what did you do for experiments people? i used a tuning fork experiment on the water level and we can observe the resonance by adjusting the tuning fork, the first sound heard would denote that a first harmonic stationary wave is created which is 1/4 th of wavelength and hence showed how to caculate it

we have to take it twice as antinode is above the tube

 

[JD REBORN]

we have to take it twice as antinode is above the tube

What was the answer to the output power of motor

 

[BILALrox01]

What was the answer to the output power of motor

umm wat was the question?

 

[AppleGreen]

What was the answer to the output power of motor

not equal

 

[BILALrox01]

umm wat was the question?

yeah not equal energy loss occurs

 

[JD REBORN]

not equal

PLZ explain

 

[BILALrox01]

lol 56 fools in the same class. amazing.

HAHA!!!!

 

[AppleGreen]

PLZ explain

yeah not equal energy loss occurs

coz thr is friction

 

[JD REBORN]

Does anyone remember change in kinetic energy and potential energy?if not then the method?And the currents in LDR question?

 

[AppleGreen]

1.76 and 2.01. 1.09^-3

 

[BILALrox01]

Does anyone remember change in kinetic energy and potential energy?if not then the method?And the currents in LDR question?

current was i think 1.1*10^-3. chnge in ke was 1.8

 

[AppleGreen]

current was i think 1.1*10^-3. chnge in ke was 1.8

Ke change is 2.01

 

[nafeekhan]

Guys, does anyone remember the very LAST question? concerning mass-energy?

THe question was to suggest a reason why mass is not conserved. there were 2 marks.

I wrote: "Mass is not conserved since some of the mass is converted to Energy. According to the equation E=mc2, Mass and Energy are directly proportional and given that c, the speed of light is constant, some of the mass is converted to energy"

will I get full 2 marks or only 1 mark for this answer?

 

[JD REBORN]

Guys, does anyone remember the very LAST question? concerning mass-energy?

THe question was to suggest a reason why mass is not conserved. there were 2 marks.

I wrote: "Mass is not conserved since some of the mass is converted to Energy. According to the equation E=mc2, Mass and Energy are directly proportional and given that c, the speed of light is constant, some of the mass is converted to energy"

will I get full 2 marks or only 1 mark for this answer?

Just so u know E=mc2 is in A2 but yeah ur answer is right.

 

[JD REBORN]

Ke change is 2.01

And change in PE?